Office 365 (Outlook 2016 | Outlook on the web) - View Calendar Event Last Modified Information
How to view information regarding who created/modified an Outlook calendar event.
Outlook on the web | Outlook 2016 for Mac
Currently, these two clients do not provide any last modification information.
Outlook 2016/2013 for Windows
Note: This information is returned when you double-click on an event - it will be located at the bottom right of the window.
User A (owner of the calendar): no modification information is presented.
User B who has read/editor permissions to User A: last modification date and user who performed the modification is returned.
User C who has full mailbox permissions to User A:
- If event was created/modified by User B:
- the editor credentials is returned, including the last modified data
- If event was created/modified by User C:
- the owner of the mailbox is returned, including the last modified date
Note: if you would like to request changes to how this feature works, please use Microsoft's customer feedback site.